All of our products come with instructions for microwave use, printed on a small card. Keep this card handy near your microwave — perhaps taped inside a cabinet door or in the “junk” drawer. Microwave for about one and one-half minutes depending on the power of your microwave and the size of the warmer. Increase or decrease the time by 30 seconds if needed. Adjust heating times according to your needs. It is possible to overheat and burn the corn. It is also possible to heat the warmer too much and burn the skin. Please be careful. Products filled with less corn will need less time to heat.